Marantz DV4500 Manuel de service télécharger pdf (Page 18)

1-6-1 E59M2TR

TROUBLESHOOTING

FLOW CHART NO.2

The fuse blows out.

After servicing, replace the fuse.

Check the presence that the primary component

is leaking or shorted and service it if defective.

Check the presence that the rectifying diode or

circuit is shorted in each rectifying circuit of

secondary side, and service it if defective.

FLOW CHART NO.3

When the output voltage fluctuates.

Ye s

FLOW CHART NO.4

When buzz sound can be heard in the vicinity of power circuit.

Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side

and service it if defective.

(D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1005, Q1011, Q1014)

Does the photo coupler circuit on the secondary

side operate normally?

Check IC1001, D1012, D1024 and their periphery,

and service it if defective.

Check IC1001, IC1006, D1048 and their

periphery, and service it if defective.

FLOW CHART NO.5

-FL is not outputted.

Is approximately -23V voltage supplied to the

anode of D1003?

Check D1003 and periphery circuit, and service it

if defective.

Check if there is any leak or short-circuit

on the loaded circuit, and service it if defective.

Ye s

FLOW CHART NO.1

The power cannot be turned on.

Is the fuse normal?

Is normal state restored when once unplugged

power cord is plugged again after several seconds?

Is the EV +3.3V line voltage normal?

See FLOW CHART No.2 <The fuse blows out.>

Check if there is any leak or short-circuiting on the

primary circuit component, and service it if defective.

(Q1003, Q1001, Q1008, T1001, D1001, D1002,

D1004, D1005, D1011, C1003, C1005)

Check each rectifying circuit of the secondary circuit

and service it if defective.

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Marantz DV4500 Manuel de service Page 18

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